Improvement in steam-boilers



F. A. Huwnmm.

Steam-Boilers.

N 134,284, Patented Dec,24,1872.

AM PHOTO-LITHOtTMPH/L CQMY OSBORNEIJ PEJUSS.)

FRANK A. HUNTINGTON, OF SAN FRANCISCO, CALIFORNIA.

IMPROVEMENT IN STEAWI-BOELERS.

Specification forming partof Letters Patent No. hglfigfl. dated December24, 1872.

To all whom it may concern:

Be it known that I, FRANKA. HUNTINGTON, ot'San Francisco city andcounty, State of Cal'- ifornia, have invented Improvements in Steam-Boilers; and I do hereby declare the following description andaccompanying drawing are sufficient to enable any person skilled. in theart or science to which it most nearly appertains to make and use mysaid invention or improvements without further invention or experiment.

The object of my present invention is to provide an improvement insteam-boilers; and it relates mainly to a novel combination andarrangement of double walls and connecting passages with a steam-boilerand tank, as more specifically hereinafter described.

Referring to the accompanying drawing for a more complete explanation ofmy invention-- Figure 1 is a longitudinal section of my boiler, showingthe space below; Fig. 2 is a horizontal section; and Fig. 3 is atransverse section.

A is a boiler, made in the present instance with two return-fines, B,and having a firespace beneath the boiler. O is the fire-box,

and D the chimney or smokestack, these parts not: differing from otherboilers of this class. Double walls are made around the fire-hon andbeneath the ash-pit, and these walls are extended along at each side ofthe boiler and beneath the fire-space, as shown at E, so that this spaceis completely inclosed. These walls are suitably braced by stay-bolts,and passages F- are made connecting the spaces with the main boiler, asshown. G is a tank for supplying the boiler with water, and is arrangedpartly over the fire-space so that'the feed-water will be partiallyheated before passing into the boiler.

Having thus described my invention, what I claim and desire to secure byLetters Patent, is-- The boiler A, fire-box G, waterspace E, passages F,and tank G, all constructed, combined, and arranged, substantially asdescribed and shown, for the purpose set forth.

In witness whereof I hereunto set my hand and seal.

FRANK A'IWOOD HUNTINGTON. [1,. 5.]

Witnesses:

J. L. BOONE, O. M. RICHARDSON.

